Results 61 to 70 of about 1,725 (169)

New Insight into Immunity and Immunopathology of Rickettsial Diseases

Journal of Immunology Research, Volume 2012, Issue 1, 2012., 2012
Human rickettsial diseases comprise a variety of clinical entities caused by microorganisms belonging to the genera Rickettsia, Orientia, Ehrlichia, and Anaplasma. These microorganisms are characterized by a strictly intracellular location which has, for long, impaired their detailed study.
Pasquale Mansueto, Giustina Vitale, Antonio Cascio, Aurelio Seidita, Ilenia Pepe, Antonio Carroccio, Salvatore di Rosa, Giovam Battista Rini, Enrico Cillari, David H. Walker, Georgios Pappas   +10 more
wiley   +1 more source

Rickettsia bellii in Amblyomma rotundatum ticks parasitizing Rhinella jimi from northeastern Brazil

Microbes and Infection, 2015
This study evaluated rickettsial infection in Amblyomma rotundatum ticks collected from toads (Rhinella jimi) in the Brazilian Caatinga biome, an unique semiarid region of South America. Tick infestations were observed in 57.8% toads (26/45); mean infestation: 1.6 ticks/toad.
Horta, Mauricio C., Saraiva, Danilo G., Oliveira, Glauber M.B., Martins, Thiago F., Labruna, Marcelo B.   +4 more
openaire   +2 more sources

Evidence of Extensive Homologous Recombination in the Core Genome of Rickettsia

International Journal of Genomics, Volume 2009, Issue 1, 2009., 2009
The important role of homologous recombination has been extensively demonstrated to be fundamental for genetic variation in bacterial genomes. In contrast to extracellular or facultative intracellular bacteria, obligate intracellular bacteria are considered to be less prone to recombination, especially for their core genomes.
Jinyu Wu, Tonghai Yu, Qiyu Bao, Fangqing Zhao, James Thomas   +4 more
wiley   +1 more source

Rickettsia infection in five areas of the state of São Paulo, Brazil

Memorias do Instituto Oswaldo Cruz, 2007
This study investigated rickettsial infection in animals, humans, ticks, and fleas collected in five areas of the state of São Paulo. Eight flea species (Adoratopsylla antiquorum antiquorum, Ctenocephalides felis felis, Polygenis atopus, Polygenis ...
Maurício C Horta, Marcelo B Labruna, Adriano Pinter, Pedro M Linardi, Teresinha T S Schumaker   +4 more
doaj   +1 more source

Prevalence and genetic diversity of endosymbiotic bacteria infecting cassava whiteflies in Africa [PDF]

, 2015
Background: Cassava provides over half of the dietary requirement for more than 200 million poor in Africa. In recent years, cassava has been affected by an epidemic of a virus disease called cassava brown streak disease (CBSD) that is spreading in much ...
Bouvaine, Sophie, Ghosh, Saptarshi, Maruthi, M.N.   +2 more
core   +1 more source

Genome‐Based Construction of the Metabolic Pathways of Orientia tsutsugamushi and Comparative Analysis within the Rickettsiales Order

International Journal of Genomics, Volume 2008, Issue 1, 2008., 2008
Orientia tsutsugamushi, the causative agent of scrub typhus, is an obligate intracellular bacterium that belongs to the order of Rickettsiales. Recently, we have reported that O. tsutsugamushi has a unique genomic structure, consisting of highly repetitive sequences, and suggested that it may provide valuable insight into the evolution of intracellular
Chan-Ki Min, Jae-Seong Yang, Sanguk Kim, Myung-Sik Choi, Ik-Sang Kim, Nam-Hyuk Cho, Antoine Danchin   +6 more
wiley   +1 more source

Antibodies against rickettsiae from spotted fever groups in horses from two mesoregions in the state of Santa Catarina, Brazil

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2013
Bacteria of the Rickettsia genus are agents of Brazilian Spotted Fever (BSF), a zoonotic disease which is difficult to diagnose, evolves quickly and can result in death. Antibodies against Rickettsia spp.
A.P. Medeiros, A.B. Moura, A.P. Souza, V. Bellato, A.A. Sartor, A. Vieira-Neto, J. Moraes-Filho, M.B. Labruna   +7 more
doaj   +1 more source

Isolation of Rickettsia rhipicephali and Rickettsia bellii from Haemaphysalis juxtakochi Ticks in the State of São Paulo, Brazil [PDF]

Applied and Environmental Microbiology, 2007
ABSTRACT In the present study, attempts to isolate Rickettsia in cell culture were performed individually in seven specimens of Haemaphysalis juxtakochi ticks collected in the state of São Paulo (southeastern Brazil).
Marcelo B, Labruna, Richard C, Pacheco, Leonardo J, Richtzenhain, Matias P J, Szabó   +3 more
openaire   +2 more sources

Anti-Rickettsia spp. antibodies in free-ranging and captive capybaras from southern Brazil

Pesquisa Veterinária Brasileira, 2011
Capybaras (Hydrochaeris hydrochaeris) are among the main hosts of Amblyomma spp. ticks, which is able to transmit Rickettsia species to human beings and animals.
Fernanda S. Fortes, Leonilda C. Santos, Zalmir S. Cubas, Ivan R. Barros-Filho, Alexander W. Biondo, Iara Silveira, Marcelo B. Labruna, Marcelo B. Molento   +7 more
doaj   +1 more source

Amblyomma aureolatum Genetic Diversity and Population Dynamics Are Not Related to Spotted Fever Epidemiological Scenarios in Brazil

Pathogens, 2021
Regional differences in tick-borne disease epidemiology may be related to biological variations between vector populations. Amblyomma aureolatum (Ixodida: Ixodidae), a neotropical tick, is known from several regions in Brazil.
Karla Bitencourth, Marinete Amorim, Stefan Vilges de Oliveira, Gilberto Salles Gazêta   +3 more
doaj   +1 more source